Home / 21,115.10-31,672.74-11,769.32

Finding the Fourth Proportional to 21,115.10, 31,672.74 and 11,769.32

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Solution

The fourth proportional to 21,115.10, 31,672.74 and 11,769.32 is: 17,654.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.10 : 31,672.74 = 11,769.32 : x
  2. Step 2: Convert to fraction form
    21,115.10/31,672.74 = 11,769.32/x
  3. Step 3: Cross multiply
    21,115.10x = 31,672.74 × 11,769.32
  4. Step 4: Simplify right side
    21,115.10x = 372,766,612.34
  5. Step 5: Solve for x
    x = 372,766,612.34/21,115.10
  6. Step 6: Final answer
    x = 17,654.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.